Chair capable of being firmly stacked

ABSTRACT

A chair capable of being firmly stacked comprises a seat; at least one supporting leg being connected to a bottom of the seat, the supporting leg including a resisting section and a wheel assembly; one end of the resisting section being connected to a bottom of the seat and another end of the resisting section being connected to the wheel assembly; the wheel assembly including a connecting block and a wheel pivoted to the connecting block; one inner side of the connecting block being formed with a resisting groove; the wheel being installed at an outer side of the supporting leg and being rotatable with respect to the connecting block; the resisting groove having a shape corresponding to a periphery of the resisting section so that the resisting groove can receive the resisting section of another chair.

The present invention is a continuation in part of U.S. patent application Ser. No. 11/766,115 which is assigned and invented to the applicant and inventor of the present invention, and thus the contents of the invention, U.S. patent application Ser. No. 11/766,115, are incorporated into the present invention as a part of the present invention.

FIELD OF THE INVENTION

The present invention relates to chairs, and particularly to a chair capable of being firmly stacked, wherein the stacking of the chairs is firm and steady with less space. Furthermore, since the wheel is at an outer side of the supporting leg, the wheel will suspended from a resisting section without contacting the resisting section of another chair. Thus no collision occurs to the wheel and thus the lifetime of the wheel is prolonged.

BACKGROUND OF THE INVENTION

In many applications, the chairs are arranged temporarily for some activities, such as meeting, exhibition or performance. After end of the activity, the chairs are collected for storage. Generally, the chairs are stacked.

However most of the prior art chairs are not designed for stacking. For example most of the prior art chairs have four legs. These legs are almost vertical to the bottom of the seat so that it is almost impossible to stack the chairs one by one. In another prior art chair, the chair has only one leg with a disk like base for supporting on the ground. This kind of chairs are still not suitable for stacking.

Another kinds of chairs suitable for stacking are illustrated in FIGS. 8 and 10, the prior art has four legs which are installed to a bottom of a seat and at an end of each leg near the ground is installed with a wheel. The wheel is pivoted to the leg and is freely rotatably with respect to the leg. The stacking of these kinds of chairs is illustrated in FIGS. 9 and 10. It is shown that in stacking, the chair at the upper side cannot firmly retain to the chair at the lower side. Moreover, as the chairs stack one by one, the stacking will incline with the extent of the height of the stacking so that the stacking of the chairs are not steady. It is very possible that the chairs fall down to the ground so that the worker must stack the chairs again. Furthermore, referring to FIG. 10, in the prior art, the wheel is at a right lower side of the leg. In stacking the wheels will be in contact with legs of another chair (see FIGS. 9 and 10). For a long time, the wheels will destroy so as to reduce the lifetime of the chair.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide a chair capable of being firmly stacked, wherein the stacking of the chairs is firm and steady, but occupies with less space. Furthermore, since the wheel is at an outer side of the supporting leg, the wheel will suspended from the resisting section without contacting the resisting section of another chair. Thus no collision occurs to the wheel and thus the lifetime of the wheel is prolonged.

To achieve above objects, the present invention provides a chair capable of being firmly stacked, comprising: a seat; at least one supporting leg being connected to a bottom of the seat, the supporting leg including a resisting section and a wheel assembly; one end of the resisting section being connected to a bottom of the seat and another end of the resisting section being connected to the wheel assembly; the wheel assembly including a connecting block and a wheel pivoted to the connecting block; one inner side of the connecting block being formed with a resisting groove; the wheel being installed at an outer side of the supporting leg and is rotatable with respect to the connecting block; the resisting groove having a shape corresponding to a periphery of the resisting section so that the resisting groove can receive the resisting section of another chair. In stacking, the seat of one chair is placed above the seat of another chair, while the resisting sections of the chair at the upper side resist against the resisting sections of the chair at the lower side.

Each resisting section is inclined to a bottom of the seat. The wheel is pivoted to the connecting block and the chair is shifted with the rotation of the wheel. A back portion is connected to the seat; each of two sides of the chair has a handle connected between the back portion and the seat. There are four supporting legs. The seat has a recessed central portion.

The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective view of the chair capable of being firmly stacked according to the present invention.

FIG. 2 is an enlarged schematic view of the chair of the present invention.

FIG. 3 is a schematic cross sectional view of the chair of the present invention.

FIG. 4 is a schematic view showing the use of the chair of the present invention.

FIG. 5 is a schematic cross sectional view showing the stacking of chairs of the present invention.

FIG. 6 is an enlarged schematic view showing the resisting of the wheels according to the present invention.

FIG. 7 is a schematic view showing the stacking of the chair according to the present invention.

FIG. 8 shows the stacking of the prior art chairs.

FIG. 9 shows another stacking state of the prior art chairs.

FIG. 10 is an enlarged schematic view showing the wheel of the chair according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.

Referring to FIGS. 1 to 3, the structure of the chair 1 of the present invention is illustrated. The present invention has the following structure.

A seat 2 has an approximate flat rectangular shape and has a recessed central portion. The seat 2 serves to support the weight of the user. A back portion 21 is connected to the seat 2. The seat 2 and back portion 21 are formed as an approximate L shape. Each of two sides of the chair 1 has a handle 22 connected between the back portion 21 and the seat 2.

At least one supporting leg 3 is connected to a bottom of the seat 2. In this embodiment, four supporting legs 3 are installed to the seat 2. The supporting leg 3 includes a resisting section 32 and a wheel assembly 31. One end of the resisting section 32 is connected to a bottom of the seat 2 and another end of the resisting section 32 is connected to the wheel assembly 31. The wheel assembly 31 includes a connecting block 310 and a wheel 312 pivoted to the connecting block 310. One inner side of the connecting block 310 is formed with a resisting groove 311. The wheel 312 is installed at an outer side of the supporting leg 3. Preferably, the connecting block 310 has an approximate rectangular shape. The resisting groove 311 has a shape corresponding to a periphery of the resisting section 32 so that the resisting groove 311 can receive the resisting section 32 of another chair.

Referring to FIGS. 4 to 7, the application of the present invention is illustrated. In stacking, the seat 2 of one chair 1 is placed above the seat 2 of another chair 1, while the resisting sections 32 of the chair 1 at the upper side resists against the resisting sections 32 of the chair 1 at the lower side. Moreover, since the resisting groove 311 is at an inner side of the supporting leg 3, the resisting groove 311 of one resisting section 32 of the chair 1 at the upper side receives a part of the resisting section 32 of the chair 1 at the loser side. As a result, the stacking of the chairs is firm and steady. Furthermore, the stacking of the chairs according to the present invention occupies less space. Since the wheel 312 is at an outer side of the supporting leg 3. the wheel 312 will suspended from the resisting section 32 without contacting the resisting section 32 of another chair. Thus no collision occurs to the wheel 312 and thus the lifetime of the wheel 312 is prolonged.

The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. 

1. A chair capable of being firmly stacked, comprising: a seat; at least one supporting leg connected to a bottom of the seat, the supporting leg including a resisting section and a wheel assembly; one end of the resisting section being connected to a bottom of the seat and another end of the resisting section being connected to the wheel assembly; the wheel assembly including a connecting block and a wheel pivoted to the connecting block; one inner side of the connecting block being formed with a resisting groove; the wheel being installed at an outer side of the supporting leg and is rotatable with respect to the connecting block; the resisting groove having a shape corresponding to a periphery of the resisting section so that the resisting groove can receive the resisting section of another chair; wherein in stacking, the seat of one chair is placed above the seat of another chair, while the resisting sections of the chair at the upper side resist against the resisting sections of the chair at the lower side.
 2. The chair capable of being firmly stacked as claimed in claim 1, wherein each resisting section is inclined to a bottom of the seat.
 3. The chair capable of being firmly stacked as claimed in claim 1, wherein the wheel is pivoted to the connecting block and the chair is shifted with the rotation of the wheel.
 4. The chair capable of being firmly stacked as claimed in claim 1, wherein a back portion is connected to the seat; each of two sides of the chair has a handle connected between the back portion and the seat.
 4. The chair capable of being firmly stacked as claimed in claim 1, wherein there are four supporting legs.
 5. The chair capable of being firmly stacked as claimed in claim 1, wherein the seat has a recessed central portion. 